while you backed off was your H angry at you? did you have any contact? if so how long before he contacted you?
My H's was angry pre-bomb until about last September...almost a whole year. When I first backed off, my H got more angry with me. He ended up getting so angry that he filed the D papers while I was on vacation. That was over 6 months ago and I still haven't been served. Anyway, I don't think it was too long after that when he started to realize that he was the one with the issues. The more I backed off, it seemed like the less angry he became.
I think the longest I have gone without contact from my H was about 3 or 4 weeks. It is hard to go NC and always have thoughts running through your mind about what your H is doing...but you have to let it go...like you say, you don't need the drama anymore.